Gear up landing in amphibian when aircraft experiences equipment malfunction.

Attributes
ACN	207353
Time
Date	199204
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ewb
State Reference	MA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Small Aircraft
Flight Phase	descent : approach landing other
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : cfi
Experience	flight time last 90 days : 65 flight time total : 2087 flight time type : 371
ASRS Report	207353
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Landing an amphibian seaplane, on the approach selected gear 2 mi out. Continued with gump check, light indicated gear pump running. About 1/4 mi out double checked indicator lights. Sun was shining in on instrument panel. All 8 lights appeared to be same intensity. Pump light off. Slight turbulence situation. Upon touchdown, realizing there was a problem with the gear, applied 40 degree flaps to hold as much weight off floats as possible. Applied enough power to maintain directional control until the aircraft stopped. Upon examination of problem found pressure switch on landing gear pump had malfunctioned and shut down before extending all gear. No damage was done to aircraft and no injuries to passengers. Plane landed on float wear strips. There is no alarm system connected with this landing system. The only way to check gear position is by gear selector arm in correct position, (4) indicator lights (blue up, green down), and by physically looking outside plane through inspection hole in top of float. From the pilot seat, this is only possible to see on left float.

Original NASA ASRS Text

Title: GEAR UP LNDG IN AMPHIBIAN WHEN ACFT EXPERIENCES EQUIP MALFUNCTION.

Narrative: LNDG AN AMPHIBIAN SEAPLANE, ON THE APCH SELECTED GEAR 2 MI OUT. CONTINUED WITH GUMP CHK, LIGHT INDICATED GEAR PUMP RUNNING. ABOUT 1/4 MI OUT DOUBLE CHKED INDICATOR LIGHTS. SUN WAS SHINING IN ON INST PANEL. ALL 8 LIGHTS APPEARED TO BE SAME INTENSITY. PUMP LIGHT OFF. SLIGHT TURB SITUATION. UPON TOUCHDOWN, REALIZING THERE WAS A PROBLEM WITH THE GEAR, APPLIED 40 DEG FLAPS TO HOLD AS MUCH WT OFF FLOATS AS POSSIBLE. APPLIED ENOUGH PWR TO MAINTAIN DIRECTIONAL CTL UNTIL THE ACFT STOPPED. UPON EXAMINATION OF PROBLEM FOUND PRESSURE SWITCH ON LNDG GEAR PUMP HAD MALFUNCTIONED AND SHUT DOWN BEFORE EXTENDING ALL GEAR. NO DAMAGE WAS DONE TO ACFT AND NO INJURIES TO PAXS. PLANE LANDED ON FLOAT WEAR STRIPS. THERE IS NO ALARM SYS CONNECTED WITH THIS LNDG SYS. THE ONLY WAY TO CHK GEAR POS IS BY GEAR SELECTOR ARM IN CORRECT POS, (4) INDICATOR LIGHTS (BLUE UP, GREEN DOWN), AND BY PHYSICALLY LOOKING OUTSIDE PLANE THROUGH INSPECTION HOLE IN TOP OF FLOAT. FROM THE PLT SEAT, THIS IS ONLY POSSIBLE TO SEE ON L FLOAT.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.